﻿#region Copyright (c) 2003 - 2008, Andreas Mueller
/////////////////////////////////////////////////////////////////////////////////////////
// 
// Copyright (c) 2003 - 2008, Andreas Mueller.
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// which accompanies this distribution, and is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// Contributors:
//    Andreas Mueller - initial API and implementation
//
// 
// This software is derived from software bearing the following
// restrictions:
// 
// Copyright (c) 1994
// Hewlett-Packard Company
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Hewlett-Packard Company makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// Copyright (c) 1996,1997
// Silicon Graphics Computer Systems, Inc.
// 
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appear in all copies and
// that both that copyright notice and this permission notice appear
// in supporting documentation.  Silicon Graphics makes no
// representations about the suitability of this software for any
// purpose.  It is provided "as is" without express or implied warranty.
// 
// 
// (C) Copyright Nicolai M. Josuttis 1999.
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// 
/////////////////////////////////////////////////////////////////////////////////////////
#endregion


using NStl.Collections;
using NStl.Iterators;
using NStl.Iterators.Support;
using NUnit.Framework;

namespace NStl.NUnit.NStlUtilFixture
{
    [TestFixture]
    public class AdvanceFixture
    {
        [Test]
        public void AdvanceRandomAcessIterator()
        {
            Vector<int> v = new Vector<int>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

            Vector<int>.Iterator it = NStlUtil.Advance<int,  Vector<int>.Iterator>(v.Begin(), 5);

            Assert.AreEqual(5, it.Value);
        }

        [Test]
        public void AdvanceRandomBidirectionalIteratorForward()
        {
            Vector<int> v = new Vector<int>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

            IBidirectionalIterator<int> inIt =
                new BidirectionalIteratorProxy<int>(NStlUtil.Advance<int, Vector<int>.Iterator>(v.Begin(), 5));

            Assert.AreEqual(5, inIt.Value);

            IBidirectionalIterator<int> it = NStlUtil.Advance<int, IBidirectionalIterator<int>>(inIt, 2);

            Assert.AreEqual(7, it.Value);
        }
        [Test]
        public void AdvanceRandomBidirectionalIteratorBackwards()
        {
            Vector<int> v = new Vector<int>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

            IBidirectionalIterator<int> inIt =
                new BidirectionalIteratorProxy<int>(NStlUtil.Advance<int, Vector<int>.Iterator>(v.Begin(), 5));

            Assert.AreEqual(5, inIt.Value);

            IBidirectionalIterator<int> it = NStlUtil.Advance<int, IBidirectionalIterator<int>>(inIt, -2);

            Assert.AreEqual(3, it.Value);
        }

        [Test]
        public void AdvanceForwardIterator()
        {
            Vector<int> v = new Vector<int>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);

            IForwardIterator<int> fwdInIt = new ForwardIteratorProxy<int>(v.Begin());
            IForwardIterator<int> it = NStlUtil.Advance<int, IForwardIterator<int>>(fwdInIt, 5);

            Assert.AreEqual(5, it.Value);
        }
    }
}
